xfs_db dont work on blocksize 4096?

[Marko Weber|8000]

hello,
does xfs_db not work on blocksize 4096 ?

i get this:

bunka distfiles # xfs_db -r /dev/sda4
xfs_db: error - read only 0 of 512 bytes
cache_node_purge: refcount was 1, not zero (node=0x686530)
xfs_db: cannot read root inode (117)
cache_node_purge: refcount was 1, not zero (node=0x688810)
xfs_db: cannot read realtime bitmap inode (117)
xfs_db: error - read only 0 of 512 bytes
xfs_db> quit

any hints, ideas tipps?

thank you

marko

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